Sunwin 60kW AC Liquid-Cooled Resistive Load Bank

1. Product Overview

The Sunwin 60kW AC liquid-cooled resistive load bank is a rack-mounted liquid-cooled load testing device designed for indoor applications, engineered for load verification of data centers, renewable energy and industrial power systems. Built around high-efficiency liquid cooling, it delivers continuous stable operation at 60kW rated power while minimizing heat dissipation and noise in the test environment — the ideal choice for indoor testing scenarios where traditional air-cooled loads fall short.

With a compact 10U/19-inch rack-mounted structure, a 304 stainless steel liquid-cooled resistor module, three-phase independent step loading and quick-connect wiring, the unit combines laboratory-grade testing accuracy with industrial-grade durability, making load testing of data center UPS, backup generators and power distribution systems quieter, cleaner and more reliable.

2. Why Liquid-Cooled Load Testing

As AI computing infrastructure grows rapidly, rack power density in data centers keeps rising, traditional air cooling is approaching its limits, and liquid cooling has become a key technology path for high-density data centers. At the same time, UPS, backup generators and power distribution systems must be verified through full-load testing (load bank testing) to ensure reliable power delivery in critical moments.

Compared with conventional air-cooled load banks, a liquid cooled load bank discharges far less hot air into the test environment, operates at lower noise and occupies less space, while transferring heat directly through the cooling water loop — making it ideal for indoor testing, equipment room commissioning and data center commissioning. The Sunwin 60kW liquid-cooled load bank is engineered for exactly this need.

3. Key Technology Highlights

3.1 High-Efficiency Liquid Cooling System

The unit adopts a 304 stainless steel liquid-cooled resistor module, connected to the cooling circulation system via a DN25 inlet/outlet water interface with a water flow of 1-5 m³/H, efficiently removing load-generated heat from the test environment. With continuous duty operation, it runs stably at full power for extended periods, significantly reducing indoor temperature rise and noise.

3.2 Rack-Mounted Compact Design with Portability

The product features a standard 10U-high, 19-inch-wide rack-mounted structure with dimensions of 487×722×454mm and an estimated weight of about 90kg, allowing flexible installation in racks or on test platforms to save equipment room space. Equipped with a carrying handle, it is easy to move and deploy across various indoor testing scenarios.

3.3 Three-Phase Independent Step Loading

Phases LA, LB and LC are each independently configured with load steps (1+2+2+5+10 kW), enabling fine and independent step loading on three-phase power supplies, accurately simulating real conditions such as three-phase unbalance and meeting the precise testing needs of data center three-phase power distribution systems.

3.4 Reliable Control and Quality Configuration

The unit is primarily manually controlled, with PLC remote control available as an option. Miniature circuit breakers and load step indicators make operation intuitive and status clear. Key electrical components use Schneider MCBs and other branded parts; the control chamber is rated IP23 (indoor), with an emergency stop button for comprehensive test safety. Enclosure colors are customizable, including RAL 7035 and orange, blue or red.

4. Main Technical Specifications

5. Typical Applications

For data centers, the unit verifies the load capacity of UPS, backup generators and power distribution systems, and supports equipment room commissioning by simulating the power and heat characteristics of real IT loads. For the renewable energy sector, it supports load testing of PV inverters, energy storage systems and charging equipment.

For industrial and indoor testing, the low-heat-dissipation, low-noise liquid cooling design suits laboratories, equipment rooms and offices sensitive to heat and noise. For continuous full-load testing, the liquid cooling system supports long-duration stable operation, offering a professional alternative where air-cooled loads cannot meet the requirement.